Answer: 630

Explanation:
Total number of players who play football and rugby together = 17% of 4200 + 13% of 4200
(17 + 13)% of 4200
30% of 4200 = 1260
Now, average number of players who play football and rugby together = 1260/2 = 630

Answer: 94

Explanation:
Number of female players who play lawn tennis
2000 x 22/100 = 440
Number of male players who play rugby = number of players who play rugby – number of female players who play rugby
4200 x 13/100 – 2000 x 10/100
546 – 200 = 346
Required difference = 440 – 346 = 94

Answer: 20 : 3

Explanation:
Number of female players who play cricket
2000 x 40/100 = 800
Number of male players who play hockey = Number of players who play hockey – number of female players who play hockey
4200 x 10/100 – 2000 x 15/100
420 – 300 = 120
Required ratio = 800/120 = 20:3

Answer: 1734

Explanation:
Total number of players who play football, cricket and lawn tennis
Together = (17 + 35 + 25)% of 4200 = 77% of 4200 = 3234
Number of female players who play football, cricket and lawn tennis together
(13 + 40 + 22) % of 2000
75% of 2000 = 1500
Required number of male players who play football, cricket and lawn tennis together = 3234 – 1500 = 1734

Answer: 33%

Explanation:
Number of male players who play rugby
Total number of players who play rugby – Total number of female players who play rugby
4200 x 13/100 – 2000 x 10/100
546 – 200 = 346
Total number of players who play lawn tennis
4200 x 25/100 = 1050
Required percentage = 346/1050 x 100% = 33%